The primary feature of this mod is to provide a modular system for resource containers and utility parts that can be transported on the back of a Kerbal and attached to specialized racks. This mod requires Kerbal Inventory System for full functionality. Get it here:   For compatibility with USI resources, you must install USI Life Support and mods that enable USI fuels(Karbonite). Versatile Toolbox System does not redistribute KIS/USI content or plugins. Release 3 adds